On Mar 23, 2012, at 9:53 AM, Luc Moreau wrote:
> Hi Tim and Khalid,
>
> Tim's suggestion was implemented [1].
Thanks. The interval is much more obvious.
>
> Regarding Khalid's suggestion, it is intentionally that we are not more specific
> about usage.
>
> DM4's section 2 says:
> Usage examples include a procedure beginning to consume an argument, a service starting to read a value on a port, a program beginning to read a configuration file, or the point at which an ingredient, such as eggs, is being added in a baking activity. Usage may entirely consume an entity (e.g. eggs are no longer available after being added to the mix); alternatively, a same entity may be used multiple times, possibly by different activities (e.g. a file on a file system can be read indefinitely).
>
>
> Given this, we propose to close this issue, pending review.
+1
-tim
>
> [1] http://dvcs.w3.org/hg/prov/raw-file/default/model/prov-dm.html#usage.time
>
> Regards,
> Luc
>
> On 02/07/2012 05:11 PM, Khalid Belhajjame wrote:
>>
>> On 06/02/2012 22:06, Provenance Working Group Issue Tracker wrote:
>>> PROV-ISSUE-245 (TLebo): entity was used -> __started__ to be used
>>>
>>> http://www.w3.org/2011/prov/track/issues/245
>>>
>>> Raised by: Timothy Lebo
>>> On product:
>>>
>>> I propose to rephrase:
>>>
>>> time: an optional "usage time" t, the time at which the entity was used;
>>>
>>> to:
>>>
>>> time: an optional "usage time" t, the time at which the entity started to be used;
>>
>> I agree we need to change teh definitition of usage time, but I am not sure the rephrasing you suggest is clearer. What does the "the time at which the entity started to be used" refers to? Perhaps, we can use instead something like
>>
>> time: an optional "usage time" t, the time at which the entity was accessed by the activity;
>>
>> Or something in these lines.
>>
>> Thanks, khalid
>>
>>
>>
>>>
>>> Thanks,
>>> Tim
>>>
>>>
>>> quote:
>>>
>>> A usage record, written used(id,a,e,t,attrs) in PROV-ASN, has the following constituent:
>>>
>>> id: an optional identifier id identifying the usage record;
>>> activity: an identifier a for an activity record, which represents the consuming activity;
>>> entity: an identifier e for an entity record, which represents the entity that is consumed;
>>> time: an optional "usage time" t, the time at which the entity was used;
>>>
>>>
>>>
>>>
>>
>>
>
> --
> Professor Luc Moreau
> Electronics and Computer Science tel: +44 23 8059 4487
> University of Southampton fax: +44 23 8059 2865
> Southampton SO17 1BJ email: l.moreau@ecs.soton.ac.uk
> United Kingdom http://www.ecs.soton.ac.uk/~lavm